U.S. patent application number 11/157696 was filed with the patent office on 2005-11-24 for dual lighting system.
Invention is credited to Gauna, Kevin W., Page, Erik R., Siminovitch, Michael.
Application Number | 20050259416 11/157696 |
Document ID | / |
Family ID | 35374939 |
Filed Date | 2005-11-24 |
United States Patent
Application |
20050259416 |
Kind Code |
A1 |
Gauna, Kevin W. ; et
al. |
November 24, 2005 |
Dual lighting system
Abstract
A dual lighting system including an LED illuminator, a lamp
positioned in proximity to the LED illuminator. It also includes a
motion sensor for detecting motion around the lighting system, a
manual switch, and a control system which is coupled to the manual
switch, the motion sensor, the lamp, and the LED illuminator. When
the manual switch is activated, the control system is configured to
turn on the lamp. If the motion sensor no longer detects motion
around the dual lighting system, the control system is configured
to turn off the lamp.
Inventors: |
Gauna, Kevin W.; (Berkeley,
CA) ; Page, Erik R.; (Winters, CA) ;
Siminovitch, Michael; (Woodland, CA) |
Correspondence
Address: |
A. RICHARD PARK, REG. NO. 41241
PARK, VAUGHAN & FLEMING LLP
2820 FIFTH STREET
DAVIS
CA
95616
US
|
Family ID: |
35374939 |
Appl. No.: |
11/157696 |
Filed: |
June 20, 2005 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
11157696 |
Jun 20, 2005 |
|
|
|
10616313 |
Jul 8, 2003 |
|
|
|
6909239 |
|
|
|
|
60607124 |
Sep 3, 2004 |
|
|
|
60635348 |
Dec 9, 2004 |
|
|
|
Current U.S.
Class: |
362/227 |
Current CPC
Class: |
F21V 19/006 20130101;
H01R 33/9453 20130101; F21S 8/033 20130101; F21K 9/232 20160801;
F21Y 2103/00 20130101; F21Y 2115/10 20160801; F21S 9/02 20130101;
F21Y 2113/20 20160801; H01R 13/7038 20130101; F21V 23/0442
20130101; H05B 35/00 20130101; F21Y 2113/00 20130101 |
Class at
Publication: |
362/227 |
International
Class: |
F21V 009/00 |
Claims
What is claimed is:
1. A dual lighting system, comprising: an LED illuminator; a lamp
positioned in proximity to the LED illuminator; a motion sensor for
detecting motion around the lighting system; a manual switch; and a
control system coupled to the manual switch, the motion sensor, the
lamp, and the LED illuminator; wherein when the manual switch is
activated, the control system is configured to turn on the lamp;
and wherein if the motion sensor no longer detects motion around
the dual lighting system, the control system is configured to turn
off the lamp.
2. The dual lighting system of claim 1, wherein the LED illuminator
is always on.
3. The dual lighting system of claim 1, wherein if the motion
sensor no longer detects motion around the lighting system for a
pre-specified amount of time, the control system turns off the
lamp.
4. The dual lighting system of claim 3, wherein when the control
system turns off the lamp, the control system also turns on the LED
illuminator.
5. The dual lighting system of claim 1, wherein the manual switch
is a momentary-off switch.
6. The dual lighting system of claim 1, wherein when the lamp is
on, activating the manual switch causes the control system to turn
off the lamp, and to turn on the LED illuminator.
7. The dual lighting system of claim 1, further comprising a
battery-backup module for the LED illuminator, wherein the battery
backup module provides power to the LED illuminator if there is a
power outage.
8. The dual lighting system of claim 7, wherein the battery backup
module uses rechargeable batteries which recharge when power is
supplied to the dual lighting system.
9. The dual lighting system of claim 1, wherein the LED illuminator
is oriented to provide indirect light by pointing toward the
ceiling or toward a wall.
10. The dual lighting system of claim 1, wherein the lamp is: an
incandescent lamp; a halogen lamp; a fluorescent lamp; or a second
LED illuminator.
11. The dual lighting system of claim 1, wherein the dual lighting
system is part of an indoor lighting fixture.
12. The dual lighting system of claim 1, wherein the dual lighting
system is part of an outdoor lighting fixture.
13. The dual lighting system of claim 1, further comprising: a
light sensor which senses lighting level; wherein if the room in
which the dual lighting system is located is dark and if the motion
sensor detects motion around the dual lighting system, the control
system is configured to turn on the lamp.
14. The dual lighting system of claim 13, wherein the control
system receives a lighting level reported by the light sensor and
adjusts the brightness of the lamp to reach a pre-specified
lighting level.
15. The dual lighting system of claim 1, wherein if the motion
sensor detects motion around the dual lighting system, the control
system is configured to turn on the lamp; and wherein if the motion
sensor no longer detects motion around the dual lighting system,
the control system is configured to turn off the lamp, thereby
providing an automatic-on and an automatic-off dual lighting
system.
16. The dual lighting system of claim 15, wherein if the motion
sensor no longer detects motion around the lighting system for a
pre-specified amount of time, the control system turns off the
lamp.
Description
RELATED APPLICATION
[0001] This application is a continuation-in-part of a pending U.S.
patent application, entitled "Dual LED/Incandescent Security
Fixture," by inventor Kevin W. Gauna, having Ser. No. 10/616,313
and a filing date of 8 Jul. 2003. This application hereby claims
priority under 35 U.S.C. .sctn.120 to the above-listed patent
application. Moreover, the above-listed application is hereby
incorporated by reference.
BACKGROUND
[0002] 1. Field of the Invention
[0003] The invention relates generally to LED lighting systems and
more particularly to indoor dual lighting systems with LEDs.
[0004] 2. Related Art
[0005] As LED technology progresses, LEDs will be used for many
lighting applications. However, the cost of light emitted from LEDs
(in dollars per lumen) remains above that of other typical light
sources. This cost will drop as the technology matures and more
illumination opportunities will be commercially viable. For
example, exit signs and traffic signals are examples of colored
lighting markets that have seen widespread commercial success by
LEDs and soon may be dominated if not monopolized by LEDs.
[0006] A low-cost and low-power lighting system is a lighting
application of great interest. Currently, LEDs are not the ideal
choice for lighting applications because of the high costs
associated with high output LED systems. Incandescent lights are
inexpensive and can be used for lighting applications, but they
consume much more energy. Thus, what is needed is a lighting system
without the above-described problems.
SUMMARY
[0007] One embodiment of the present invention provides a dual
lighting system including an LED illuminator, a lamp positioned in
proximity to the LED illuminator. It also includes a motion sensor
for detecting motion around the lighting system, a manual switch,
and a control system which is coupled to the manual switch, the
motion sensor, the lamp, and the LED illuminator. When the manual
switch is activated, the control system is configured to turn on
the lamp. If the motion sensor no longer detects motion around the
dual lighting system, the control system is configured to turn off
the lamp.
[0008] In a variation on this embodiment, the LED illuminator is
always on.
[0009] In a variation on this embodiment, if the motion sensor no
longer detects motion around the lighting system for a
pre-specified amount of time, the control system turns off the
lamp.
[0010] In a further variation on this embodiment, when the control
system turns off the lamp, the control system also turns on the LED
illuminator.
[0011] In a variation on this embodiment, the manual switch is a
momentary-off switch.
[0012] In a variation on this embodiment, when the lamp is on,
activating the manual switch causes the control system to turn off
the lamp, and to turn on the LED illuminator.
[0013] In a variation on this embodiment, the dual lighting system
includes a battery backup module for the LED illuminator, which
provides power to the LED illuminator if there is a power
outage.
[0014] In a further variation on this embodiment, the battery
backup module uses rechargeable batteries which recharge when power
is supplied to the dual lighting system.
[0015] In a variation on this embodiment, the LED illuminator is
oriented to provide indirect light by pointing toward the ceiling
or toward a wall.
[0016] In a variation on this embodiment, the lamp is an
incandescent lamp, a halogen lamp, a fluorescent lamp, or a second
LED illuminator.
[0017] In a variation on this embodiment, the dual lighting system
is part of an indoor lighting fixture.
[0018] In a variation on this embodiment, the dual lighting system
is part of an outdoor lighting fixture.
[0019] In a variation on this embodiment, the dual lighting system
includes a light sensor which senses a lighting level. If the room
in which the dual lighting system is located is dark and if the
motion sensor detects motion around the dual lighting system, the
control system is configured to turn on the lamp.
[0020] In a further variation on this embodiment, the control
system compares the current lighting level reported by the light
sensor and adjusts the brightness of the lamp to reach a
pre-specified lighting level.
BRIEF DESCRIPTION OF THE FIGURES
[0021] FIG. 1 presents a dual LED/incandescent security lighting
system in accordance with an embodiment of the present
invention.
[0022] FIGS. 2-5 present variations of the dual LED/incandescent
security lighting system of FIG. 1 in accordance with embodiments
of the present invention.
[0023] FIG. 6 presents the dual LED/incandescent security lighting
system with a separate LED drop unit in accordance with an
embodiment of the present invention.
[0024] FIG. 7 presents a block diagram of a control system for the
dual LED/incandescent outdoor lighting system in accordance with an
embodiment of the present invention.
[0025] FIG. 8 presents a block diagram of a control system for the
dual LED/incandescent indoor lighting system in accordance with an
embodiment of the present invention.
DETAILED DESCRIPTION
[0026] The following description is presented to enable any person
skilled in the art to make and use the invention, and is provided
in the context of a particular application and its requirements.
Various modifications to the disclosed embodiments will be readily
apparent to those skilled in the art, and the general principles
defined herein may be applied to other embodiments and applications
without departing from the spirit and scope of the present
invention. Thus, the present invention is not limited to the
embodiments shown, but is to be accorded the widest scope
consistent with the principles and features disclosed herein.
[0027] LED/Incandescent Security Lighting System
[0028] As shown in FIG. 1, hybrid LED/incandescent light fixture 10
combines an LED array 12 and an incandescent lamp (A-lamp) 14 in a
single housing 16. The incandescent source or lamp 14 screws into a
standard socket 15 and is held in a horizontal position. The LED
array 12 is placed facing down from the top 22 of the housing 16,
near the front edge, and extending forward substantially beyond
A-lamp 14. The top 22 of housing 16 not only supports the LED array
12 but also provides a heatsink for the LED array 12 and provides a
physical shield to prevent light from either the LED array 12 or
A-lamp 14 from traveling upwards into the night sky. Housing 16 is
attached to a wall mount/power supply unit 17, which is attached to
wall 20 and electrically connected to a power source, typically
standard electrical wiring from a power line. Socket 15 and LED
array 12 are electrically connected to unit 17 for power. A motion
detector 18 is mounted below housing 16 (or elsewhere) and is also
electrically connected to unit 17 for power. The control system for
fixture 10 is contained in unit 17.
[0029] Also forming a part of housing 16, extending down from top
22 and surrounding or enclosing LED array 12 and A-lamp 14, is a
diffuser or lens 19, which typically is a diffuser but also may be
a clear lens. The front part 23 of diffuser/lens 19 is typically
tapered inwardly from top to bottom. LED array 12 includes a
plurality of LEDs 21. The LEDs are typically amber or yellow in
color, but may be other colors or even white. A-lamp 14 may be
replaced by a halogen lamp, or compact fluorescent lamp, or other
lamp. Diffuser/lens 19 allows the light from LED array 12 and from
A-lamp 14 to pass to the local environment, generally illuminating
the area around fixture 10. Diffuser/lens 19 is typically formed of
flat or roughened panes of clear or translucent glass or
plastic.
[0030] In operation, a sensor detects the occurrence of darkness
and turns on the LED array 12. After that, whenever motion sensor
18 detects motion in the vicinity of fixture 10, the A-lamp 14 is
switched on, and remains on for a preset time. LED array 12 may
remain on when A-lamp 14 is on, or it may shut off to conserve
energy and to prevent color shadows.
[0031] The construction of the fixture 10 is such that the light
output is directed down, mitigating light pollution issues. This
fixture is intended as a replacement fixture: it either replaces a
porch light in a retrofit application, or is used in new
construction as an alternative to another porch light.
[0032] FIG. 2 shows a dual LED/incandescent fixture which is very
similar to fixture 10 of FIG. 1 except for the position of LED
array 12 relative to A-lamp 14. In fixture 11, LED array 12 is
recessed into housing 16 so that it is over A-lamp 14. Most of the
light from LED array 12, then passes through A-lamp 14, which acts
as a diffuser, so lens 19 is then typically clear. The remaining
components are the same as in FIG. 1.
[0033] FIG. 3 shows an alternate embodiment of the invention with
the incandescent lamp 14 in a lamp down orientation. The LEDs 21
are mounted in a ring around the base of the A-lamp 14. Dual
LED/incandescent fixture 25 incorporates many of the same
components as fixtures 10, 11 but in a different arrangement.
Fixture 25 hangs down from a wall or overhang 20. Power supply/wall
mount unit 17 is attached under wall 20 and contains the electrical
connections to the power source and the control system. Socket 15,
into which A-lamp 14 screws, is mounted under and electrically
connected to unit 17. LEDs 21 are mounted on and electrically
connected to unit 17, forming an array 12. Motion sensor 18 is
integrated into unit 17. Diffuser/lens 19 extends down from unit 17
and encloses and surrounds LEDs 21 and A-lamp 14.
[0034] FIG. 4 shows another embodiment of the invention that is
intended as a screw-in retrofit. In the dual fixture 30, the LEDs
21 and associated electronics are integrated into a screw-in A-lamp
type base 32. This base 32 then receives a standard A-lamp, 14 in
A-lamp socket 33. Base 32 screws into a standard socket in a wall
which is connected to electrical power, e.g. in a standard porch
light fixture. A-lamp 14 and LEDs 21 are thereby electrically
connected to a power source. A light guide or cover lens 34 that
attaches to the base 32 may be necessary to control the light
distribution, as well as mitigate direct glare from the LEDs 21.
LEDs 21 are arranged in an array 12 around the edge of base 32 and
are aligned with an input section 35 of light guide/lens 34.
[0035] In an alternate embodiment shown in FIG. 5, dual
LED/incandescent system 40 separates the LED lighting component
from the incandescent lighting fixture. There are separate
side-by-side fixtures, LED fixture 42 and A-lamp fixture 44. A-lamp
fixture 44 is essentially a standard porch light fixture. LED
fixture 42 attaches to wall 20, e.g. at an outdoor junction box. An
array 12 of LEDs 21 is mounted in LED fixture 42, facing downward,
and enclosed or surrounded by a diffuser/lens 43. LED fixture 42 is
built to receive an A-lamp fixture 44 on its front surface, as
shown by arrows 45. A-lamp fixture 44 includes a downward facing
incandescent lamp 14, which screws into electrical socket 15. A
diffuser/lens 46 encloses and surrounds A-lamp 14. The electronics,
including the motion sensor, are typically mounted in LED fixture
42.
[0036] Another embodiment of the invention, shown in FIG. 6, also
separates the LED light component from the incandescent fixture.
But instead of having the LED, motion sensor, and control
electronics in the same box, dual LED/incandescent system 50 has an
LED "drop" unit 52 under the main incandescent unit control box 54.
Control box 54 is configured to mount onto a wall. The front
surface is configured to receive a standard "porch light" type
fixture 55 (similar to fixture 44 in FIG. 5). Control box 54
typically contains the LED driver circuit, the motion control
circuit, and the daylight sensing circuit. Drop unit 52 contains
the LEDs and the motion-sensor, which operates through motion
sensor window 53. Drop unit 52 is connected to main unit 54 by drop
arm 56. The drop arm could have an adjustable length, and could be
set by the end user according to the particular installation
environment. This "drop" feature accomplishes several things. It
lowers the LED emitters, reducing the problem of direct glare from
the LEDs and increasing the illuminance on the ground below the
fixture. It allows the motion sensor unit, also incorporated into
the drop unit, to clear the porch light fixture and see the
appropriate field of view for proper motion sensing operation. It
also separates the heat generating LEDs from the rest of the unit,
keeping this heat away from the control electronics.
[0037] FIG. 7 presents a block diagram of control system 60 for the
dual LED/incandescent outdoor lighting system in accordance with an
embodiment of the present invention. A detector 61 detects the
onset of darkness and actuates a switch 62 which turns on LED array
63. During darkness, when motion sensor 64 detects motion, its
output signal is combined with the output signal from detector 61,
e.g. in AND gate 65, to actuate a second switch 66 to turn on
A-lamp 67. Once A-lamp 67 is turned on, a timer 68 which is also
actuated by switch 66 may be used to turn off A-lamp 67 after a
preset and selectable period of time. Switch 66, when turned on,
may also turn off switch 62 to shut off the LED array 63 when
A-lamp 67 is on.
[0038] This type of hybrid approach to LED illumination has the
following advantages and benefits.
[0039] 1) The LED source (one or more LEDs in an array) consumes a
relatively small amount of power compared to the incandescent
source, yielding substantial energy savings without a loss in
functionality.
[0040] 2) The LED source provides ambient illumination to the area,
eliminating the "all-or-nothing" effect of traditional motion
sensor fixtures.
[0041] 3) The LED source will have a very long lifetime, ensuring
at least some illumination to the control area when the
incandescent lamp fails.
[0042] 4) With colored LED sources, the motion activated
incandescent lamp will provide a color change when triggered,
increasing the conspicuousness of the motion activation and
increasing the security benefit of the trigger.
[0043] 5) With colored LED sources, different nighttime aesthetics
can be achieved.
[0044] 6) The combination of the LED source(s) and the incandescent
source yields the best dollars per lumen ratio for the target
applications. The number of (expensive) LEDs is kept to a minimum
while, at the same time, the incandescent lamp provides a high
lumen output for good visibility when the application area is
occupied.
[0045] LED/Incandescent Indoor Lighting System
[0046] The day/night detector makes the LED/incandescent security
lighting system well suited for outdoor use. The incandescent light
turns on only when it is dark and when there is someone passing by
the area covered by the motion sensor. However, for indoor
applications such as hotel rooms, there is little or no sunlight,
so therefore the day/night detector can be removed. One embodiment
of the present invention provides an indoor lighting system which
is turned on manually but shuts off automatically.
[0047] FIG. 8 presents a block diagram of a control system for the
dual LED/incandescent indoor lighting system in accordance with an
embodiment of the present invention. It contains controller 802,
motion sensor 804, manual switch 806, LED illuminator 808, lamp
810, timer 812, and battery backup module 814. Note that lamp 810
can be an incandescent lamp, a halogen lamp, a fluorescent lamp, or
any other light source.
[0048] In one embodiment of the present invention, when manual
switch 806 is activated, controller 802 turns on lamp 810. In one
embodiment of the present invention, LED illuminator 808 is always
on, thus providing a night-light. In another embodiment of the
present invention, LED illuminator 808 is turned off when
controller 802 turns on lamp 810.
[0049] If lamp 810 is on and if motion sensor 804 no longer detects
motion around the lighting system, controller 802 turns off lamp
810. In another embodiment of the present invention, controller 802
turns off lamp 810 if motion sensor 804 does not detect motion
around the lighting system for a pre-specified amount of time.
Controller 802 determines whether the pre-specified amount of time
has passed by checking the elapsed time reported by timer 812. In
yet another embodiment of the present invention, controller 802
turns off LED illuminator 808 when turning off lamp 810.
[0050] Note that if lamp 810 is off and motion sensor 804 detects
motion around the lighting system, controller 802 does not turn on
lamp 810. Instead, controller 802 waits for manual switch 806 to
activate before turning on lamp 810.
[0051] In one embodiment of the present invention, if lamp 810 is
on, activating manual switch 806 causes controller 802 to turn off
lamp 810. Note that if LED illuminator 808 is currently off,
controller 802 turns on LED illuminator 808 when it turns off lamp
810, thereby providing a low-power lighting source.
[0052] In one embodiment of the present invention, battery backup
module 814 provides power to LED illuminator 808 if there is a
power failure. Note that battery backup module can contain
rechargeable batteries which recharge when power is supplied to the
LED/incandescent indoor lighting system.
[0053] In one embodiment of the present invention, manual switch
806 is a momentary switch which, when depressed, causes an open
circuit momentarily. Note that power is always going to the
lighting system. If lamp 810 is initially on (State A), depressing
the momentary switch causes controller 802 to turn off lamp 810 and
turn on LED illuminator 808 (State B). State B is a night-light
state.
[0054] If there is a power outage, then battery backup module
provides power to LED illuminator 808 to provide light to the room
(State C).
[0055] In one embodiment of the present invention, the LED
illuminator is oriented toward the ceiling or toward a wall to
provide indirect light.
[0056] In one embodiment of the present invention, a light sensor
is used to sense lighting level. If it is dark and motion sensor
804 detects motion around the dual lighting system, controller 802
turns on lamp 810.
[0057] In another embodiment of the present invention, controller
802 adjusts the brightness of lamp 810 to a pre-specified lighting
level based on the current lighting level of the room. For
instance, if some sunlight reaches the room, but the lighting level
does not reach the pre-specified lighting level, controller 802
adjusts the brightness of lamp 810 to provide enough light to reach
the pre-specified lighting level.
[0058] The foregoing descriptions of embodiments of the present
invention have been presented only for purposes of illustration and
description. They are not intended to be exhaustive or to limit the
present invention to the forms disclosed. Accordingly, many
modifications and variations will be apparent to practitioners
skilled in the art. Additionally, the above disclosure is not
intended to limit the present invention. The scope of the present
invention is defined by the appended claims.
* * * * *